The type of reverberation echo that usually results from a small gas bubble and appears as a high-amplitude echo occurring at regular intervals is called a

What does the arrow in the following image point to? 

What type of resolution is degraded in the presence of grating lobes and side lobes?

When the speed of fluid is constant across a vessel, the flow is called _________ flow.

The type of artifact that produces a reduction in echoes distal to a highly reflective or highly attenuating structure is 

Flow increases if _________________ increase(s).

Which of the following terms describes the change in direction of an ultrasonic beam when it passes from one medium to another in which elasticity and density differ from those in the first medium? 

If Doppler angle is doubled, the Doppler shift is 

The maximum Doppler shift frequency that can be sampled without aliasing is called 

Frame rate is determined by penetration depth and: